Backport partition tests from 10.0-galera.

mysql-test/suite/galera/r/galera_var_load_data_splitting.result

+CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;
+SET GLOBAL wsrep_load_data_splitting = TRUE;
+SELECT COUNT(*) = 95000 FROM t1;
+COUNT(*) = 95000
+1
+wsrep_last_committed_diff
+1
+SET GLOBAL wsrep_load_data_splitting = 1;;
+DROP TABLE t1;

mysql-test/suite/galera/r/partition.result

+#
+# MDEV#4953 Galera: DELETE from a partitioned table is not replicated
+#
+USE test;
+CREATE TABLE t1 (pk INT PRIMARY KEY, i INT) ENGINE=INNODB PARTITION BY HASH(pk) PARTITIONS 2;
+INSERT INTO t1 VALUES (1,100), (2,200);
+SELECT * FROM t1;
+pk	i
+2	200
+1	100
+DELETE FROM t1;
+SELECT * FROM t1;
+pk	i
+
+# On node_1
+SELECT * FROM t1;
+pk	i
+
+# On node_2
+SELECT * FROM t1;
+pk	i
+DROP TABLE t1;
+# End of test

mysql-test/suite/galera/t/galera_var_load_data_splitting.test

+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+
+--let $wsrep_load_data_splitting_orig = `SELECT @@wsrep_load_data_splitting`
+
+# Create a file for LOAD DATA with 95K entries
+--perl
+open(FILE, ">", "$ENV{'MYSQLTEST_VARDIR'}/tmp/galera_var_load_data_splitting.csv") or die;
+foreach  my $i (1..95000) {
+	print FILE "$i\n";
+}
+EOF
+
+CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;
+
+# Record wsrep_last_committed as it was before LOAD DATA
+--connection node_2
+--let $wsrep_last_committed_before = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
+
+SET GLOBAL wsrep_load_data_splitting = TRUE;
+--disable_query_log
+--eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/galera_var_load_data_splitting.csv' INTO TABLE t1;
+--enable_query_log
+
+--connection node_2
+--let $wsrep_last_committed_after = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
+
+SELECT COUNT(*) = 95000 FROM t1;
+
+# LOAD-ing 95K rows causes 10 commits to be registered
+--disable_query_log
+--eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before + 10 AS wsrep_last_committed_diff;
+--enable_query_log
+
+--connection node_1
+--eval SET GLOBAL wsrep_load_data_splitting = $wsrep_load_data_splitting_orig;
+
+DROP TABLE t1;

mysql-test/suite/galera/t/partition.test

+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+--source include/have_partition.inc
+
+--echo #
+--echo # MDEV#4953 Galera: DELETE from a partitioned table is not replicated
+--echo #
+
+USE test;
+CREATE TABLE t1 (pk INT PRIMARY KEY, i INT) ENGINE=INNODB PARTITION BY HASH(pk) PARTITIONS 2;
+INSERT INTO t1 VALUES (1,100), (2,200);
+SELECT * FROM t1;
+
+DELETE FROM t1;
+SELECT * FROM t1;
+
+--echo
+--echo # On node_1
+--connection node_1
+SELECT * FROM t1;
+
+--echo
+--echo # On node_2
+--connection node_2
+SELECT * FROM t1;
+
+# Cleanup
+DROP TABLE t1;
+
+--source include/galera_end.inc
+--echo # End of test